dennisson



unirsi) srarns PATENT OFFICE.

J. N. DENNISSON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELF, T. W. LOVERREE, JOS. DENNISSON, AND DAVID BAKER, ALL OF SAME PLACE.

STEAM-GONIDENSER.

Specification of Letters Patent No. 22,916, dated February 8, 1859.

To all whom it may concern.'

Be it known that I, JOHN N. DENNIssoN, of the city of Newark, in the county of EsseX, State of New Jersey, have invented certain Improvements in Condensers; and I do declare the following to be a full and exact description of the same, reference being had therein to the drawings which accompany this specification and which make part of the same, in which- Figure l is a perspective view of the condenser and its attachments, and Fig. 2, a sectional view of one of the pumps and its connections, the same letters referring to the saine parts in each figure.

The nature of my improvement or invention consists in providing for the escape of the air, gas and steam which has heretofore been the cause of failure in attempting to make a practical use of such condensers.

The steam to be condensed is received by the pipe A (Fig. l) into an open space between the two vessels B and C. The inner vessel C is constructed with tubes through it, the ends of the tubes being open into the space between the two vessels B and C, so thatthe steam passes through the tubes, as well as around the vessel C. The condensat-ion going on below these vessels, draws the steam condensed or uncondensed through the pipe D into the inside of the vessel F, which like C is made with tubes passing through it having their ends open. This vessel F is placed in a tank, the top of the tank being open. This tank E is constantly supplied with cold water by the pump Cr. From F the condensed steam flows through the pipe H into the worm I. The worm I is inclosed in a tight chest J, int-o which chest the water is admitted if required, through the pipe a from the pump G. The supply is regulated by the cock o. The end of theworm I is connected with the pump K by the pipe o, the pump K draws the water from the worm I, forces it through the pipe a into the inside of the vessel C. The vessel C being made sufficiently strong to stand the pressure required to force the water through the pipe o, into the boiler. In the pipe o attached to the pump K is placed a small vessel i with a convex top. A small pipe g which enters the pump K,

close to topof the pump, is inserted through the top of the vessel z', its end reaching near to the bottom, as shown in Fig. 2. A cock m, is placed at the end which enters the pump, to regulate the orifice to the size the case may require. From the top of the small vessel, i, an escape pipe n with a lightvalve 0 on its top, is made to project to any required height.

The rapidity of condensation required in actual practice, is such, that more or less steam will inevitably find its way to the pump K, and also some portion of rarefied air. The air and steam when compressed in a pump to a degree greater than that of the pressure of the atmosphere must of necessity interfere with the uniform working of the pump, when the retreat of the plunger tends to th-e formation of a vacuum, the mingled air and steam alternate, and their pressure decreases. Just so far as it falls below atmospheric pressure to just that degree is water admitted, and no farther; hence the irregularity in all attempts to pump hot water. I'n my invention this difliculty is sufficiently removed to allow the practical and profitable working of condensers of the kind described', for I appeal to the fact of their being not in use after reported trials, as evidence of their failure.

It will be seen on referring to the drawings that when the plunger p in the pump K, rises, and the water follows it in the barrel of the pump, the water will also rise up the pipe g. The air and steam being attenuated will be compressed above the water upon the return of the plunger p, the space being lessened by the partial filling of the pump with water. The pressure forces the air and steam through the orice of the cock m down the pipe g into the vessel 2', where rising to the top they escape into the air, up the pipe n through the valve 0.

That I claim and desire to secure is- A feed pump with its attachments and connections substantially as described, in combination with a condenser constructed and arranged as herein above setforth.

J. N. DENNISSON.

Vitnesses:

WM. M. GooDiNG, HIRAM A. EoKLEs. 

